Winding and reeling machine



E. MULLER WINDING AND REELING MACHINE March 5, 1963 3 Sheets-Sheet 1 Filed Feb. 27. 1961 INVENTOR RUST MULLER flaMLLu W? $1 M ATTORNEYS March 5, 1963 E. MULLER 3,080,133

WINDING AND REELING ciHINE Filed Feb. 27, 1961 3 Sheets-Sheet 2 I VENTOR 56/1/57" fibzzw ATTORNEYS March 5, 1963 E. MULLER 3,080

WINDING AND REELING MACHINE Filed Feb. 27, 1961 5 Sheets-sheaf 3 70 64 INVENTOR [aw/WWI); 5e

ATTORNEY With winding and reeling machines it is often required that tensioning of the material being wound or reeled shall remain nearly constant even when the take-oil speed of the material being wound alters as a result of increasing diameter of the wind-up reel or spool, when spool cores of non-circular cross-section e.g. of rectangular cross-section are being wound, or for any other reasons. Hitherto it has only been possible to satisfy this requirement to an insufficient extent or not at all. The invention makes it possible in a simple and reliable manner to maintain constant-at least for all practical purposesthe tension of the material being wound in winding or reeling machines of all types.

The invention consists in an apparatus for maintaining constant the tension of the material being wound with varying wind-off speed winding or reeling machines and is characterised in the fact that the material to be wound is at least patrially looped round a roller mounted on a movable part which tends to assume a rest position under the effect of a force eg. gravity, spring loading or the like and which is deflected out of its rest position by the efiect of the take-oil force acting on said material, this movable part so controlling a brake for the material that the braking effect of this brake decreases when there is an increase in the deflection of the movable part from its rest position and increases when this deflection decreases.

This apparatus is suitable l'oruse with all types of material for winding of thread or strip formation, for example textile threads and yarns and wires from which windings for electric instruments and devices are made, him and other toil-like strips etc; it is of no importance whether the alteration in the take-oil speed is continuous or periodic.

Under certain circumstances it is suitable to provide the movable part, on which the roller for the material to run on is mounted, with a damping device in order to avoid-in particular, for example, when winding on spool or roller cores of non-circular cross-sectionpossible oscillations of said movable part in consequence of the periodically increasing and decreasing take-oil speed.

In the accompanying drawings three embodiments of the apparatus according to the invention are shown. There is shown:

FIGURE 1 is a diagrammatic sketch showing the principle of the apparatus.

FIGURE 2 is a front view of a first embodiment of the invention.

FIGURE 3 is a section taken along the broken line III-Ill of FIGURE 2.

FIGURE 4 is a view taken from the rear.

FIGURE 5 is a section along the line V-V of FIG- URE 4.

FIGURE 6 is a front view of a second embodiment of the invention.

FIGURE 7 is a section along the line VII-VII of FIGURE 6.

FIGURE 8 is a front view of a third embodiment of the invention.

Patented Mar. 5, l dfi FIGURE 9 is a view of the apparatus in the direction of the arrow A in FIGURE 8.

FIGURE 10 is a view of the apparatus shown in FIG- URES 8 and 9, viewed from the rear.

FIGURE 11 is a plan view of the invention as shown in FIGURE 10.

FIGURE 12 is a view in the direction of arrow B in FIGURE 10.

In FIGURE 1A indicates a spindle mounted in two bearings L and L arranged on a carrier e.g. a pendulum which tends to assume a rest position under the effect of a force S. Bearings L and L with spindle A can thus commonly move in the direction of the arrows shown at the ends of spindle A. On spindle A is mounted a roller R over which the material to be wound W is fed from a storage spoolor roller (not shown) to the utilisation station and which is driven by the material W. 6n spindle A there is also mounted a brake drum T which has wound round it a brake cable or wire one of whose end parts B is fixed to a fixture member 0 arranged on the carrier P carrying the bearings L and L the other of its end parts B being fixed to a stationary point F which is independent of the position of said carrier P. A brake for the material W can be provided between the storage spool or roller and guide roller R. This brake V has the function of imparting to the material W under all circumstances such a tensional stress that it cannot slip over guide roller R.

In operation said carrier P is deflectedunder the effect of the tensional force Z acting on the material W and dependent on the take-oil resistance and on the takeoff speedfrom its rest position in the direction of the fixed point F; at a given draw-oil speed of the material W equilibrium of forces is reached between the sum of the take-oil force Z and the cable tension of the end part B of the brake cable or wire on the one hand and the oppositely-directed force S on the other hand.

If with increasing take-oil? speed of the material W and/or with stronger preliminary braking of the material W in brake V the tension of the material and so the tensional force Z become greater, then this equilibrium of forces is disturbed and carrier P is further deflected in the direction of the fixed point P from its rest position. This however ins the direct consequence that the cable tension at the end part B of the brake cable or wire de-' creases and the braking of the brake drum T, and so of spindle A--which rotates therewith-with guideroller R, is decreased. The resistance imparted by guide roller R to the material W is thus, with increase of the take-ofi': speed of material W and/ or of the preliminary braking thereof, reduced spontaneously and to a corresponding egree, so that the tensioning Z of the material to be wound remains, at least for all practical purposes, constant and is not affected by the increase of the take-elf speed. If there is a decrease in the take-off speed of the material W and an associated decrease in the take-off force Z, then the apparatus operates in the opposite mannor is. carrier P approaches its rest position whereby the cable tension at the end part B of the brake cable or Wire increases and the brake drum B and so the spindle A with guide roller R is more strongly braked.

In order to prevent a component of the tensioning of the material W conditioned by the take-oil resistance and possibly the preliminary braking from having a disturbing eliect on the carrier Pand also to achieve as far as possible a linear alteration in the braking effectthe material W should be so guided that it runs on to the roller perpendicular to the longitudinal direction of the pendulum P in its rest position and runs off from this guide roller R in a direction parallel to the longitudinal direction of pendulum P, or vice versa.

The material W can run in the reverse direction if the preliminary brake V is displaced to the intake side; with this arrangement deflection of carrier P from the rest position takes place through the effect of the take-off resistance of material W from the storage roll or spool and of the preliminary braking.

The embodiment according to figures 2 to has a support fixed in stationary manner on the frame of the winding or reeling machine (not shown) and formed from two vertical plates la and 1b which are parallel to one another and connected together by bolts 2. On a horizontal pin 3 mounted in the upper part of the support la, lib is mounted a pendulum 4 located between plates 1:: and 1b which has on its lower end a bearing 4a wherein a shaft 6 parallel to pin 3 is mounted in ball bearings 5a and 5b, the end portions of shaft 6 extending through cut-away portions 7a and 7b in plates 1a and 1b and being capable of movement therein. A guide roller 8 is mounted on the end of shaft 6 extending beyond the forward plate 1a. Material 9 is led to roller 8 from a storage spool or roll (not shown) and through a brake device 10 disposed below on the front side of plate 1a and whose braking action is adjustable by means of a screw 10a; material 9 is then wound round three-quarters of the contact surface of guide roller 8, passes over a guide roller 11 which is mounted on a shaft 13 rotatable in ball bearings 12:: and 12b on support 1a, 1b and then proceeds to the wind-up station (not shown) of the winding or reeling machine. On the end of shaft 6 projecting through and beyond plate 1b is mounted a brake drum 14 round which is wound a brake cable or wire 15 one of whose ends is fixed to a bolt 16 on pendulum 4, an aperture being provided for said bolt 16 in plate 1b; the other end of this brake cable or wire is firmly clamped in a clamp 17 disposed in the direction of shaft 13 on plate 1b. The pendulum has on its upper portion an arm 18 extending away from it at a right-angle and lying between plates la and 1b; on this arm a slider weight 19 is firmly and adjustably clamped by means of a clamping screw 20. At the end of this arm 18 is jointed one end of a piston rod 2-1 01; whose other end is a damping piston 22 which is suspended in a damping cylinder 23 located between plates la and 1b and suitably filled with oil.

The material to be wound 9 coming from the storage roll or spool receives a preliminary braking to the required extent by. means of the braking device 10, 10a. As shaft 6 and with it roller 8 is braked by brake drum 14 and brake cable or wire 15, the material 9 receives. a further braking which increases its tension. In con; seq'u en c'e of the take-off force acting. on the material 9 the pendulum 4 together with. all parts arranged thereon is deflected from its rest position in the take-oh direction of material 9, from guide -roller 8. The braking effect of brake drum 14-. and brake cable or wire 15 can be altered by'changin g' the adjustment of the slider weight 19. on. arm 1-8; in this way the tension of the material 9 can be COD". trolled tothe required value. If the tension of material 9 is increased as a. result of increase in the take-off speed of material 9 and/ or preliminary braking, then this causes an immediate further deflection of pendulum 4 in the above-mentioned direction. However in this way the brake cable or wire 15 is at once slackened and the brake drum 14 and the roller 8 in rotating connection therewith is correspondingly less strongly braked. On the other hand if the tension of material 9 decreases in consequence of decrease in the take-off speed thereof, the result of this is that the pendulum 4 approaches its rest position and thus further tightens the brake cable or wire 15, the brake drum 14- and roller. in rotational connection therewith being more strongly braked. Thus the equilibrium of forces and so the required tension of ma terial 9 are continuously maintained.

The damping device consisting of the damping piston- 22 and damping cylinder 23 has the function of preventing harmful oscillation phenomena of the pendulum and parts arranged thereon, such as can occur with periodically increasing and decreasing take-off speed of material 9, for example when Winding the material on roll or spool cores of non-circular cross-section.

In the embodiment of the apparatus according to the invention as illustrated in FIGURES 6 and 7 a horizontal pin 32 is firmly arranged in a vertical plate 31 disposed in stationarymanner on the frame of the winding or reeling machine (not shown); on this pin 32 is pivotably mounted one end of a pivot piece 33 having a rolling surface perpendicular to plate 31 and whose free end bears against the end of a set screw 34 disposed on plate 31. On the rolling surface of pivot piece 33 runs a trol-r ley 35 on two pairs of rollers 345a and 36b, a shaft 38 which is perpendicular to plate 31 being mounted in ball bearings 37a and 37b on this trolley 35. On this shaft 38 are mounted a guide roller 39 for the material to be wound 40 and a brake drum 41. The material 40 is drawn off from a storage roll or spool (not shown) and guided over the roller 39;, the material being wound round three-quarters of the rolling or contact surface of this guide roller 39; material 40 then runs over a further guide roller 42 mounted freely rotatably on pin 32, and then passes to the wind-up station (not shown) of the winding or reeling machine. The brake drum 41 has coiled round it a brake cable or wire 43 one of whose ends is fixed to a bolt 44 provided on the trolley 35, while its other end portion, which is parallel to the material 40 extending from roller 39 to the further guide roller 42, is secured to a bolt 45 arranged on a support 46 of the part of the pivot piece mounted on pin 32,.

Trolley 35 is lifted somewhat from its lowermost posi tion in consequence of the braking of the roller 39. by the brake drum 41 and the brake cable or wire 43 wound round the latter under the effect of the take-01f force acting on material 4% The weight component of trolley 35 and the parts arranged thereon acting on the material 4t} running to the wind-up stat-ion varies according to the inclination of the rolling surface of the pivot piece 33; through adjustment of this inclination of pivot piece 33 by means of the set screw 34 the tension of the material 40 can thus be controlled to the required degree. The end part of the brake cable or wire 43 secured, to the, bolt 45 extends, in any position of pivot piece 33, parallel tothe material 40 between the roller 39 and the guide roller 42. The operation of the apparatus according to this embodiment of the invention accordingly corresponds to. that of the above-described embodiment illustrated. in FIGURES 2 to 5 As in the case of the above described embodiment (FIGURES. 2 to 5) aprelirninary brake for the material. 40 can be disposed upstream. of the-described apparatus, and trolley 35 may also, if required, be equipped with a damping device.

The embodiment of the apparatus shown in FIGURES 8v to 12 has a base plate 51 fixed in stationary manner on the frame of the winding or reeling machine (not shown). On this base plate 51 are arranged in rigid manner two parallel vertical side walls 52a and 52b. Between the side walls 52a and 52b and in the upper part thereof a pivot pin is mounted between points, a pendulum 54' being mounted on said pivot pin. At the free end of pendulum 54 is mounted a spindle 55' which passes through bores in the front and rear walls 52a and 52b and, can pivot therein. On the end of this spindle 55 projecting beyond the front side wall 52a a roller 56' for the material tobe wound 57 is freely rotatably mounted. On pendulum 54 and in the upper part thereof are two parallel plates 58a and 58b having the, shape of sectors of a circle; between said plates is mounted one end of; a lever 60 on a pin 59 passing through said plates. This.

sped-13s 6 lever 60 lies loosely on a pin 61 which is displaceable in horizontal guide slots 62a and 62b in side walls 52a or 5211. The end of pin 61 visible from the front in guide slot 62a of side wall 52a has an adjustment mark, and on the front side or the side wall 52a a scale is arranged on guide slot 62a. The end of pin 61 projecting to the rear beyond the rear wall 52b is provided with a handle 64. At the free end of lever 69 engages one end of a tension spring 65 whose other end is fixed to a holding member 66 disposed on the base plate 51. Between side walls 52a and 52b and in the centre part thereof a shaft 67 is mounted in ball bearings; at the end of this shaft 67 projecting to the front beyond the front side wall 52a is mounted a roller 68 for the material 57, and at its end projecting to the rear beyond the rear side wall 52b is mounted a brake drum 69. This brake drum 69 is wound round by at least one brake cable or wire 70 one of whose ends is secured in a clamp 71 located to the rear on the back of the rear side wall while the other end of this cable or wire is secured to the end of spindle 55 projecting to the rear beyond the rear side wall 52b. In order to preventin the case of breakage or rupture of the brake cable or wire 70-braking of brake drum 69 and so of the shaft 67 with roller 68 being discontinued, there is provided in the embodiment shown two parallel brake cables or wires 7%. On rupture of one brake cable or wire 70, the other one will be doubly loaded and the braking action thus maintained. There is arranged on the front side of the front side wall 52a and on the side opposite the roller for the material to be wound or reeled, a preliminary brake 72 intended for this material 57 and whose braking effect is controllable by means of a screw 72a.

The material 57 is drawn from a storage roll or spool (not shown) through the preliminary brake 72 and up to the roller 56 mounted on the pendulum 54; it then runs downwards from roller 56 to the braked roller 68 which it runs round to the extent of three-quarters of the rollers contact surface and is then fed to the wind-up station of the machine. The material 57 braked by the preliminary rake 72 and which must drive the roller 68 is subjected to-in consequence of the braking of this roller 63 by the brake drum 69 and the brake cable or wire 70-an increase in its tensioning. This tensioning is on the other hand dependent on the speed of take-oif of material 5'7. At a specific take-oil speed of the material 57 the pendulum 5'4 on which guide roller 56 is mounted is-in consequence of the tension of the material running from the guide roller 56detlected from its rest position towards the roller 63 against the force of the tension spring 65 engaging lever 60 jointed to pendulum 54, until equilibrium is established between the tension of the material 57 drawn off from the braked roller 6% to the wind-up station on the one hand and, on the other hand, the braking efiect of the roller 63 on the material 5'7 increased by the tension exerted by the force of the tension spring 65 on the material 57 via lever 66*, pin 59, plates 58a and 58b, pendulum 54 and the guide roller 56 mounted thereon. The braking effect of the roller 68 depends on the tension of the brake cable or wires 76, and this tension is in its turn dependent on the position of the pendulum 54 or of the pin 55 mounted therein. If the take-off speed and so the tension of the material 57' drawn from guide roller 56 is increased, then the pendulum 54 is further deflected from its rest position towards roller 68 against the force of tension spring 65. This however causes a slackening of the brake cables or wires '70 which has as its consequence that the braking of roller 63 is correspondingly lessened. On the other hand when there is a decrease in the take-oil speed and so of the tension of the material 57 running from roller 56, the pendulum 54 approaches its rest position under the influence of the tension spring 65 and the result of this is that the brake cables or wires 6 70 are more tightly stressed and the braking of roller 68 is correspondingly increased. The initially adjusted tension of the material running from roller 68 to the windup station is thus maintained whatever the alterations of the take-off speed of material 67.

As lever 60 swings on pin 61 the effect of the tension spring can be altered by displacement of this pin 61 within the guide slots 62a and 62b in side walls 52a and 52b and the associated alteration of the lever arm conditions. The calibrated scale 63 on the guide slot 62a renders possible a very accurate adjustment of the tension of the material 57 running off. The scale 63 shows the tension of the material set in conjunction with the adjustment mark on the end of pin 61 visible in guide slot 62a. If required a damping device can also be provided on lever 60 or on pendulum 54.

In place of the above described damping device illustrated in FIGURE 3, a pneumatic magnetic or electromagnetic damping device can be used.

1. An apparatus for maintaining constant the tension of material passing with varying take-off speed through the apparatus to a winding-up station of a winding or reeling machine, comprising a stationary base plate and two parallel vertical plates mounted thereon and each provided with a horizontal elongated slot, a horizontal pin rigidly mounted in the two side plates, a pendulum swingably suspended by its upper end from the pin, a horizontal spindle secured to the free end of the pendulum and swingable therewith, a first guide roller rotatable with the spindle, a second spindle mounted rotatably in the vertical plates, a second guide roller mounted on one end of the second spindle and rotatable therewith, the material to be wound passing in sequence to the first guide roller and then to the second guide roller and being coiled round at least part of the contact surface of these rollers, a brake drum mounted on the end of the second spindle remote from the second guide roller and rotatable with the latter, at least one brake cable coiled round the brake drum, a clamp fixed to a stationary part of the apparatus, one end of the brake cable being secured to the clamp and the other end being secured to the pendulum, a lever extend ing between and substantially parallel to the two vertical plates and rigidly secured by one end to the upper end of the pendulum, a tension spring supported at its lower end on a stationary part of the apparatus while its upper end is attached to the end of the lever remote from the pendulum, a horizontal pivot pin parallel with the pin on which the pendulum is mounted and projecting to the outside of the vertical plates through the elongated slot therein, the lever resting in swingable manner on the pivot pin, gripping means for varying the position of the pivot pin within the slots and thus controlling the tensioning eficct of its spring on the pendulum and so setting the rest position of the pendulum, the arrangement being such that an increase in the tensioning force acting on the material moves the pendulum, against the force of the spring from its rest position towards the brake drum, so that the brake cable is slackened and the second guide roller is less strongly braked, and when there is a decrease in the tensioning force acting on the material the pendulum is moved towards its rest position, the brake cable tightens and the brake drum exerts a stronger braking efiect on the second guide roller.

2. An apparatus as claimed in claim 1, wherein the pivot pin is provided at one of its ends with an adjusting mark cooperating with an adjustment scale arranged on the elongated slot through which this end of the pivot pin projects.

3. An apparatus as claimed in claim 1 further comprising adjustable preliminary braking means provided for preliminary braking of the material and so located that the material passes through the preliminary braking means prior to passing over the first and second guide rollers.

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1. AN APPARATUS FOR MAINTAINING CONSTANT THE TENSION OF MATERIAL PASSING WITH VARYING TAKE-OFF SPEED THROUGH THE APPARATUS TO A WINDING-UP STATION OF A WINDING OR REELING MACHINE, COMPRISING A STATIONARY BASE PLATE AND TWO PARALLEL VERTICAL PLATES MOUNTED THEREON AND EACH PROVIDED WITH A HORIZONTAL ELONGATED SLOT, A HORIZONTAL PIN RIGIDLY MOUNTED IN THE TWO SIDE PLATES, A PENDULUM SWINGABLY SUSPENDED BY ITS UPPER END FROM THE PIN, A HORIZONTAL SPINDLE SECURED TO THE FREE END OF THE PENDULUM AND SWINGABLE THEREWITH, A FIRST GUIDE ROLLER ROTATABLE WITH THE SPINDLE, A SECOND SPINDLE MOUNTED ROTATABLY IN THE VERTICAL PLATES, A SECOND GUIDE ROLLER MOUNTED ON ONE END OF THE SECOND SPINDLE AND ROTATABLE THEREWITH, THE MATERIAL TO BE WOUND PASSING IN SEQUENCE TO THE FIRST GUIDE ROLLER AND THEN TO THE SECOND GUIDE ROLLER AND BEING COILED ROUND AT LEAST PART OF THE CONTACT SURFACE OF THESE ROLLERS, A BRAKE DRUM MOUNTED ON THE END OF THE SECOND SPINDLE REMOTE FROM THE SECOND GUIDE ROLLER AND ROTATABLE WITH THE LATTER, AT LEAST ONE BRAKE CABLE COILED ROUND THE BRAKE DRUM, A CLAMP FIXED TO A STATIONARY PART OF THE APPARATUS, ONE END OF THE BRAKE CABLE BEING SECURED TO THE CLAMP AND THE OTHER END BEING SECURED TO THE PENDULUM, A LEVER EXTENDING BETWEEN AND SUBSTANTIALLY PARALLEL TO THE TWO VERTICAL PLATES AND RIGIDLY SECURED BY ONE END TO THE UPPER END OF THE PENDULUM, A TENSION SPRING SUPPORTED AT ITS LOWER END ON A STATIONARY PART OF THE APPARATUS WHILE ITS UPPER END IS ATTACHED TO THE END OF THE LEVER REMOTE FROM THE PENDULUM, A HORIZONTAL PIVOT PIN PARALLEL WITH THE PIN ON WHICH THE PENDULUM IS MOUNTED AND PROJECTING TO THE OUTSIDE OF THE VERTICAL PLATES THROUGH THE ELONGATED SLOT THEREIN, THE LEVER RESTING IN SWINGABLE MANNER ON THE PIVOT PIN, GRIPPING MEANS FOR VARYING THE POSITION OF THE PIVOT PIN WITHIN THE SLOTS AND THUS CONTROLLING THE TENSIONING EFFECT OF ITS SPRING ON THE PENDULUM AND SO SETTING THE REST POSITION OF THE PENDULUM, THE ARRANGEMENT BEING SUCH THAT AN INCREASE IN THE TENSIONING FORCE ACTING ON THE MATERIAL MOVES THE PENDULUM, AGAINST THE FORCE OF THE SPRING FROM ITS REST POSITION TOWARDS THE BRAKE DRUM, SO THAT THE BRAKE CABLE IS SLACKENED AND THE SECOND GUIDE ROLLER IS LESS STRONGLY BRAKED, AND WHEN THERE IS A DECREASE IN THE TENSIONING FORCE ACTING ON THE MATERIAL THE PENDULUM IS MOVED TOWARDS ITS REST POSITION, THE BRAKE CABLE TIGHTENS AND THE BRAKE DRUM EXERTS A STRONGER BRAKING EFFECT ON THE SECOND GUIDE ROLLER. 